Double-ended one pin UV germicidal lanps Quick start, save the circuitry, ... -Z1554null155465null425200nullnullnullZW14S15Y-Z287null28714null42535nullnullnull For example: ZW40S25Y-Z1199 stands for:UV germicidal lamp ,150W, double-ended, OD 25mm, ozone produce, ozone free ... length is 1550MMFor exampleZW95D19Y-Z1554 stands for:UV germicidal lamp,150W,single-endedD,OD 19MM,ozone produceYozone freeW,tube ...